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Finding the Fourth Proportional to 42,993.99, 64,407.08 and 28,157.90

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Solution

The fourth proportional to 42,993.99, 64,407.08 and 28,157.90 is: 42,181.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,993.99 : 64,407.08 = 28,157.90 : x
  2. Step 2: Convert to fraction form
    42,993.99/64,407.08 = 28,157.90/x
  3. Step 3: Cross multiply
    42,993.99x = 64,407.08 × 28,157.90
  4. Step 4: Simplify right side
    42,993.99x = 1,813,567,866.29
  5. Step 5: Solve for x
    x = 1,813,567,866.29/42,993.99
  6. Step 6: Final answer
    x = 42,181.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.